Energy in Capacitors: An air-filled capacitor has a potential difference between the plates of 80 V. If the charge on each of the plates of the capacitor has magnitude 8.0 ?C, what is the electrical energy stored by this capacitor?
A. 640 µJ
B. 320 µJ
C. 50 nJ
D. 60 nJ
E. 30 pJ
Answer: B
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